<?php

class PostController extends Controller
{

        /**
         * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
         * using two-column layout. See 'protected/views/layouts/column2.php'.
         */
        public $layout = '//layouts/column2';

        /**
         * @return array action filters
         */
        public function filters()
        {
                return array(
                        'accessControl', // perform access control for CRUD operations
                );
        }

        /**
         * Specifies the access control rules.
         * This method is used by the 'accessControl' filter.
         * @return array access control rules
         */
        public function accessRules()
        {
                return Yii::app()->params['commonAccessRule'];
        }

        /**
         * Displays a particular model.
         * @param integer $id the ID of the model to be displayed
         */
        public function actionView($id)
        {
                $post = $this->loadModel($id);
                $comments = $this->newComment($post);

                $post->increaseFrequncy();
                $relCommentsProvider = $post->getRelativeCommentsProvider();

                $this->render('view', array(
                        'model' => $post,
                        'comments' => $comments,
                        'relCommentsProvider' => $relCommentsProvider,
                ));
        }

        /**
         * 
         * Create comment model for the partial comment view in post view
         * @param unknown_type $post
         */
        protected function newComment($post)
        {
                $comment = new Comment;

                if (isset($_POST['ajax']) && $_POST['ajax'] === 'comment-form')
                {
                        echo CActiveForm::validate($comment);
                        Yii::app()->end();
                }

                if (isset($_POST['Comment']))
                {
                        $comment->attributes = $_POST['Comment'];
                        if ($post->addComment($comment))
                        {
                                Yii::app()->user->setFlash('commentSubmitted', 'Thank you...');
                                $this->refresh();
                        }
                }
                return $comment;
        }

        /**
         * Creates a new model.
         * If creation is successful, the browser will be redirected to the 'view' page.
         */
        public function actionCreate()
        {
                $model = new Post;
                $tagArray = $this->getAllTags();

                // Uncomment the following line if AJAX validation is needed
                $this->performAjaxValidation($model);

                if (isset($_POST['Post']))
                {
                        $model->attributes = $_POST['Post'];
                        if ($model->save())
                                $this->redirect(array('view', 'id' => $model->id));
                }

                $this->render('create', array(
                        'model' => $model,
                        'tagArray' => $tagArray,
                ));
        }

        protected function getAllTags()
        {
                $tmp = Tag::model()->findAll();
                $tagArray = array();
                foreach ($tmp as $item)
                {
                        $tagArray[] = $item->name;
                }
                return $tagArray;
        }

        /**
         * Updates a particular model.
         * If update is successful, the browser will be redirected to the 'view' page.
         * @param integer $id the ID of the model to be updated
         */
        public function actionUpdate($id)
        {
                $model = $this->loadModel($id);
                $tagArray = $this->getAllTags();

                // Uncomment the following line if AJAX validation is needed
                $this->performAjaxValidation($model);

                if (isset($_POST['Post']))
                {
                        $model->attributes = $_POST['Post'];
                        if ($model->save())
                                $this->redirect(array('view', 'id' => $model->id));
                }

                $this->render('update', array(
                        'model' => $model,
                        'tagArray' => $tagArray,
                ));
        }

        /**
         * Deletes a particular model.
         * If deletion is successful, the browser will be redirected to the 'admin' page.
         * @param integer $id the ID of the model to be deleted
         */
        public function actionDelete($id)
        {
                if (Yii::app()->request->isPostRequest)
                {
                        // we only allow deletion via POST request
                        $this->loadModel($id)->delete();

                        // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
                        if (!isset($_GET['ajax']))
                                $this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
                }
                else
                        throw new CHttpException(400, 'Invalid request. Please do not repeat this request again.');
        }

        /**
         * Lists all models.
         */
        public function actionIndex()
        {
                $dataProvider = new CActiveDataProvider('Post');
                if (Yii::app()->user->isGuest)
                {
                        $dataProvider->criteria = array(
                                'condition' => 'status=' . Post::STATUS_PUBLISHED,
                                'order' => 'update_time DESC',
                                'with' => array('commentCount', 'postviews'),
                        );
                } else
                {
                        $dataProvider->criteria = array(
                                'order' => 'update_time DESC',
                                'with' => array('commentCount', 'postviews'),
                        );
                }

                if (isset($_GET['tag']))
                        $dataProvider->criteria->addSearchCondition('tags', $_GET['tag']);

                $dataProvider->pagination = array('pageSize' => 5);
                $this->render('index', array(
                        'dataProvider' => $dataProvider,
                ));
        }

        /**
         * Manages all models.
         */
        public function actionAdmin()
        {
                $model = new Post('search');
                $model->unsetAttributes();  // clear any default values
                if (isset($_GET['Post']))
                        $model->attributes = $_GET['Post'];

                $this->render('admin', array(
                        'model' => $model,
                ));
        }

        /**
         * Returns the data model based on the primary key given in the GET variable.
         * If the data model is not found, an HTTP exception will be raised.
         * @param integer the ID of the model to be loaded
         */
        public function loadModel($id)
        {
                $model = Post::model()->findByPk($id);
                if ($model === null)
                        throw new CHttpException(404, 'The requested page does not exist.');
                return $model;
        }

        /**
         * Performs the AJAX validation.
         * @param CModel the model to be validated
         */
        protected function performAjaxValidation($model)
        {
                if (isset($_POST['ajax']) && $_POST['ajax'] === 'post-form')
                {
                        echo CActiveForm::validate($model);
                        Yii::app()->end();
                }
        }

}
